Sanyo freeview receiver has suddenly stopped working, showing a constant amber light against signal and nothing else.

Appears to be still functioning to some degree as allowing antenna signal to come into it and outputing to TV for analogue service but thats it.  Rebooting has made no difference.  Anntena seems fine as still receiving/delivering anagloue service.

Couldnt find anything on line so was hoping someone may have some ideas...

I guess of course the box may have just given up but would have thought it would work more than 4 years.

Cheers